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- W3148434900 abstract "Surface promoters-modified Cu/ZnO/Al_2O_3(CZA) catalysts were prepared by a coprecipitationpost impregnation method and evaluated in methanol synthesis from syngas.The effects of Zr,Ba,and Mn as promoters,the reaction temperature and run time over CZA and Zr-promoted CZA catalysts on catalytic performance were investigated,respectively.The catalysts were characterized by X-ray diffraction(XRD),N_2-sorption,reactive N_2O sorption,X-ray photoelectron spectroscopy(XPS),temperature-programmed desorption of H_2(H_2-TPD),scanning electron microscopy(SEM),and high-resolution transmittance electron microscopy(HR-TEM).The results showed that the space-time yield(STY) of methanol can be increased noticeably over the Zr-or Ba-promoted CZA catalyst before and after the heating treatment of the catalysts.The introduction of Mn as a promoter onto the CZA catalyst led to a decrease in the STY of methanol before heating treatment.The introduction of Zr as a promoter onto the CZA catalyst can decrease the temperature at which the STY of methanol reached the highest value and also improve the catalytic stability.A hydrogen molecule can be adsorbed and then activated over Cu~0 and ZnO.The strong interaction between Cu~0 and ZnO is favorable for improving the catalytic performance of the CZA catalyst.The decrease in catalytic performance after heating treatment of the CZA catalysts is attributed to a growth of Cu~0 crystallites.Based on the results of catalytic performance and characterization,a possible bidirectional but synchronous catalytic reaction coursein methanol synthesis from syngas over a CZA catalyst is proposed." @default.
- W3148434900 created "2021-04-13" @default.
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- W3148434900 date "2013-01-01" @default.
- W3148434900 modified "2023-09-25" @default.
- W3148434900 title "Effect of Surface Promoters-Modifying on Catalytic Performance of Cu/ZnO/Al_2O_3 Methanol Synthesis Catalyst" @default.
- W3148434900 hasPublicationYear "2013" @default.
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